Building projects today are not only born out digitally, but they are also realized digitally through “file-to-factory” processes of computer aided manufacturing (CAM) and computer numerically controlled (CNC) technologies. It was the challenge of constructability that brought into question, what new instruments of practice are needed to take advantage of the opportunities opened up by the digital modes of production, instead of whether a particular form is buildable. In this case of building construction, architects could design with attention to innovative details, afforded by unique shapes and sizes, knowing that whatever they created on their computer screen could be fabricated digitally for an affordable price. The aims of the research are to discuss and analyze the digital manufacturing techniques (CAM) in architecture and its fabrication, production process. To understand how these technologies fit within a broader context of architectural practice. The research begins with defining, what is digital manufacturing in architecture, its potentials, components and influences in the contemporary architecture. Further more it discusses the digital fabrication, Two- dimensional cutting, subtractive fabrication, additive fabrication and formative fabrication. The assembly technique, building skin, new materials and mass- customization in digital manufacturing techniques (CAM). That will be a hand in analyzing several case studies.